Reporter

A second teenager was in a coma on Sunday after his skull was fractured in another one-punch attack on Sydney's streets.

Less than a week after 18-year-old Daniel Christie was allegedly punched in the face by Shaun McNeil in Kings Cross, 19-year-old Alexander McEwen was punched by a stranger in the drive-through of Penrith McDonald's.

Police said they found 13 vials of steroids at the Kingswood home of his alleged attacker, Corey Beard, who publicised a love of boxing, ultimate fighting knockouts and "world extreme fighting'' online.

A court was told Mr Beard and a friend had left the Peach Tree Hotel in Penrith about 1.30am on Sunday when they approached two women who were standing with Mr McEwen and his brother, Lance McEwen-Henderson, 21, outside McDonald's.

Advertisement

It sparked a verbal altercation and Mr Beard allegedly punched Mr McEwen-Henderson, leaving him with facial injuries including a cut lip.

Mr McEwen, who was standing on a one-metre high retaining wall, leant down to defend his brother and was allegedly punched once by Mr Beard with a closed fist, police said.

Mr Beard then allegedly grabbed Mr McEwen's T-shirt and thrust him over the wall, causing him to smash his head on the ground and lose consciousness.

"I was just freaking out,'' Mr McEwen-Henderson told Channel Seven. "I thought he was dead, to be honest.''

Late on Sunday, Mr McEwen, from Glenmore Park, emerged from his coma and was in a stable condition in Nepean Hospital.

Mr Christie remained in a critical condition in St Vincent's Hospital on Sunday.

Mr Beard's legal aid lawyer said he had told police he was acting in self-defence.

Arrests over steroid possession hit an all-time high in the last financial year, according to data from the Australian Crime Commission. The number of performance and image enhancing drugs detected at the border also increased by 56.9 per cent in 2011, the highest in a decade.

Premier Barry O'Farrell expressed concern last week over a rapidly emerging steroid culture and its link to violence.

"There is a suggestion that you don't get a body like that without actually being on steroids,'' he said, referring to Mr McNeil, a self-proclaimed mixed martial arts fighter and gym junkie.

"And we do know a roid rage causes people to be violent.''

Acting Opposition Leader Linda Burney said Labor would "wholeheartedly'' support a trial of the Newcastle model of lockouts and early closing times if the state government chose to implement it.

On Saturday night, a woman was allegedly punched in the face by a man at The Rocks after being kicked out of a nightclub.

In Granville, a 20-year-old man had an artery in his left bicep severed when he was allegedly hit with a glass during a fight at a party in a park at 3.45am on Sunday.

Last month, Michael McEwen, 23, suffered serious head injuries during an alcohol-fuelled attack at Bondi.